ACCELERATION OF LIME-CLAY REACTIONS WITH SALT

THE EFFECT OF POTASSIUM IODIDE ON AN EXPANSIVE CLAYEY SOIL TREATED WITH LIME AND CEMENT HAS BEEN INVESTIGATED. ON THE BASIS OF EXPERIENCE REGARDING THE UTILITY OF THE DIFFERENTIAL THERMAL ANALYSIS (DTA) TECHNIQUE IN A SIMILAR SITUATION, THE INTERPRETATIONS OF THE PAPER ON "ACCELERATION OF LIME-CLAY REACTIONS WITH SOIL", IS DISCUSSED. THE IDENTIFICATION OF CLAY MINERALS ON THE BASIS OF DTA CURVES COULD BE AN ERROR. THE STATEMENT IS ILLUSTRATED BY CONSIDERATION OF THE DTA CHARACTERISTICS OF MONTMORILLONITE. IT IS NECESSARY TO SUPPLEMENT THE DTA DATA WITH X-RAY DIFFRACTION CHARACTERISTICS, BASE EXCHANGE CAPACITIES, SWELLING CHARACTERISTICS, CHEMICAL ANALYSES ETC., IF CONCLUSIVE IDENTIFICATION IS TO BE MADE. THE DTA OF SOIL, LIME, AND 1% SODIUM CHLORIDE WITHOUT ADDITION OF ANY MOISTURE, IF OBTAINED, WOULD HELP IN SEPARATING THE EFFECTS OF THE MERE PRESENCE OF LIME AND SODIUM CHLORIDE FROM THE EFFECT OF THE REACTION OF THESE WITH SOIL-LIME-SODIUM CHLORIDE-WATER MIXTURE. IT IS POINTED OUT THAT A NEW PEAK ON THE DTA CURVE DOES NOT MEAN THAT THE NEW MATERIAL IS CRYSTALLINE. NO DATA WAS FOUND TO SUPPORT THE SUGGESTION THAT THE ROLE OF SODIUM CHLORIDE IS A CATALYST. ADVANTAGES IN THE USE OF POTASSIUM IODIDE AS A TRACE ADDITIVE WITH A MIXTURE OF LIME AND CLAY CONTAINING MAJOR AMOUNTS OF BEIDELLITE AND NOUTRONITE IS POINTED OUT.

  • Authors:
    • Tyagi, K S
  • Publication Date: 1973-4

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  • Accession Number: 00233385
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 17 1973 12:00AM